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"Too many people are losing their lives on that river. We wanna be part of the process to correct that," said Helene's uncle, Ken Brandy.

According to the lawyer who filed the federal lawsuit, Evan's parents are echoing those concerns, saying the Army Corps of Engineers didn't provide adequate warning to boaters and kayakers of the dangerous Dashields Dam.

The lawyers are asking for more warning signs.

Evans' family is also asking for earnings potential and damages for pain and suffering.